I've just finished month 2 of my 3-month project to bring Set List Maker to Android. The app now includes audio functions (recordings, tempos and starting pitches), document display and auto-scrolling, MIDI input/output and custom song layouts.
One thing the Android version will be able to do that the iOS version can't do is invert the colors in attached PDF files to match your selected color theme (light or dark). However, the Android version will only be able to display PDF documents, not other formats like the iOS version.
In September, I'll set up the database syncing, which will work between Android and iOS versions, and start beta testing.